| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2006 by Jens Arnold |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "button.h" |
| #include "backlight.h" |
| #include "adc.h" |
| |
| /* |
| Ondio hardware button hookup |
| ============================ |
| |
| LEFT, RIGHT, UP, DOWN: connected to AN4 through a resistor network |
| |
| The voltage on AN4 depends on which keys (or key combo) is pressed |
| |
| OPTION: AN2, high active (assigned as MENU) |
| ON/OFF: AN3, low active (assigned as OFF) |
| */ |
| |
| int button_read_device(void) |
| { |
| int btn = BUTTON_NONE; |
| int data; |
| |
| /* Check the 4 direction keys */ |
| data = adc_read(ADC_BUTTON_ROW1); |
| if (data >= 165) |
| { |
| if (data >= 585) |
| if (data >= 755) |
| btn = BUTTON_LEFT; |
| else |
| btn = BUTTON_RIGHT; |
| else |
| if (data >= 415) |
| btn = BUTTON_UP; |
| else |
| btn = BUTTON_DOWN; |
| } |
| |
| if(adc_read(ADC_BUTTON_OPTION) > 0x200) /* active high */ |
| btn |= BUTTON_MENU; |
| if(adc_read(ADC_BUTTON_ONOFF) < 0x120) /* active low */ |
| btn |= BUTTON_OFF; |
| |
| return btn; |
| } |